221302212101 has 4 divisors (see below), whose sum is σ = 223788753900. Its totient is φ = 218815670304.

The previous prime is 221302212091. The next prime is 221302212119. The reversal of 221302212101 is 101212203122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72614080900 + 148688131201 = 269470^2 + 385601^2 .

It is a cyclic number.

It is not a de Polignac number, because 221302212101 - 2¹⁰ = 221302211077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221302212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221302212121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1243270766 + ... + 1243270943.

It is an arithmetic number, because the mean of its divisors is an integer number (55947188475).

Almost surely, 2^221302212101 is an apocalyptic number.

It is an amenable number.

221302212101 is a deficient number, since it is larger than the sum of its proper divisors (2486541799).

221302212101 is an equidigital number, since it uses as much as digits as its factorization.

221302212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486541798.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221302212101 its reverse (101212203122), we get a palindrome (322514415223).

The spelling of 221302212101 in words is "two hundred twenty-one billion, three hundred two million, two hundred twelve thousand, one hundred one".